Gripping control method for large annular piece rolling process under blank polygon contour deviation

Abstract

The invention discloses a gripping control method for a large annular piece rolling process under blank polygon contour deviation. An annular blank with the outer contour being a regular polygon and the inner contour being a regular circle serves as a research object, in the rolling and shaping process, based on the fuzzy control principle, the current wall thickness difference, namely the difference between the current wall thickness and the minimum wall thickness, and the current wall thickness difference change rate serve as input, a corresponding fuzzy rule is established according to artificial experience summarized in the actual operation process, and the position of a core roller is controlled through a fuzzy control algorithm, so that the hole between the core roller and a driving roller changes adaptively along with the current wall thickness. By means of the gripping control method, the conditions of annular piece gripping clamping and unstable rolling caused by blank deviation can be avoided, the wall thickness of the annular blank gradually tends to be uniform, preconditions are provided for stable rolling in the next step, the possibility of annular piece scrapping is reduced to a great extent, and the forming quality of the large annular piece is improved.

Description

technical field [0001] The invention relates to the field of ring rolling, in particular to a biting control method for a large ring rolling process under the deviation of the polygonal profile of a billet. Background technique [0002] Ring parts, as key basic parts, are widely used in industrial fields. With the rapid development of the world's industrial production, the demand for high-quality rings of different materials is also increasing. However, due to the low production efficiency, large errors, large amount of subsequent turning and serious waste of resources in the early ring manufacturing process, etc. Shortcomings, can no longer meet the needs of rapid industrial development. Compared with the traditional ring manufacturing process, the ring rolling technology not only has the advantages of energy saving, material saving and high production efficiency, but also produces rings with small dimensional error, denser ring structure and better mechanical properties. ...

AI Technical Summary

Problems solved by technology

In the actual rolling process, especially in the rolling process of super-large rings, due to the lack of systematic theoretical guidance, various defects are prone to occur, resulting in serious problems such as low production efficiency, scrapped rings, and waste of resources. It is not conducive to the rapid mass production of high-quality ring parts, and it is difficult to meet the needs of industrial production in time

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